Three steps can be useful in this regard. First, you should help him to identify and categorize his thoughts. Then, you should re-organize the priorities of his needs and goals (The Five Ws). Finally, you explain what can be achieved and how, using symbolic techniques and tools (maps, 3d, photos, videos, etc) .
The couple papers could highlight other points that you are probably looking for.
Best,
- Coyne, Richard D., Michael A. Rosenman, and Antony D. Radford. "Knowledge based design systems." (1990).
- Archer, L. Bruce. "The structure of design processes." PhD diss., Royal College of Art, 1968.
Based on my experience since I have been handling my practice for 20 years from now. conceptualising the ideas of the client in to your own interpretations have worked better.in the initial meeting don't show the animation or so many drawings just focus on your verbal presentations and may be a conceptual drawing let that curiosity get generated, the client will also start having a sense of respect towards your ability and creativity. then in the next meeting be ready with the animations/three D views to present along with basic 2D plans and you will not loose the client.